/// <summary>
        /// parse xml/json list stream and close it.
        /// </summary>
        /// <param name="input"></param>
        /// <param name="option"></param>
        public DanbooruPostDao(Stream input, DanbooruPostDaoOption option)
        {
            string rawData = "";
            this.Option = option;
            try
            {
                using (StreamReader reader = new StreamReader(input))
                {
                    rawData = reader.ReadToEnd();
                }
                this.Option = option;
                switch (option.Provider.Preferred)
                {
                    case PreferredMethod.Xml:
                        ReadXML(rawData, option);
                        break;

                    case PreferredMethod.Json:
                        ReadJSON(rawData, option);
                        break;

                    case PreferredMethod.Html:
                        DanbooruSearchParam param = new DanbooruSearchParam()
                        {
                            Provider = option.Provider,
                            Tag = option.SearchTags,
                            Option = option
                        };
                        if (option.Provider.BoardType == BoardType.Danbooru)
                        {
                            SankakuComplexParser parser = new SankakuComplexParser();
                            posts = parser.Parse(rawData, param);
                        }
                        else if (option.Provider.BoardType == BoardType.Gelbooru)
                        {
                            GelbooruHtmlParser parser = new GelbooruHtmlParser();
                            posts = parser.Parse(rawData, param);
                        }
                        else
                        {
                            throw new NotImplementedException("No HTML Parser for: " + option.Provider.Name);
                        }
                        break;
                }
            }
            catch (Exception)
            {
                Helper.DumpRawData(rawData, Option.Provider, option.Query);
                throw;
            }
        }
        public string GetQueryString(DanbooruSearchParam searchParam)
        {
            var queryStr = "";
            if (this.BoardType == BoardType.Shimmie2)
            {
                queryStr = DanbooruDownloader3.Engine.ShimmieEngine.GetQueryString(this, searchParam);
            }
            else if (this.Url.Contains("sankakucomplex.com"))
            {
                queryStr = new SankakuComplexParser().GenerateQueryString(searchParam);
            }
            else
            {
                queryStr = DanbooruDownloader3.Engine.DanbooruXmlEngine.GetQueryString(this, searchParam);
            }

            return queryStr;
        }
        public void TestSankakuTagParser()
        {
            string target = @"../../../DanbooruDownloader3.test/TestXml/sankakutagspage.htm";
            var data = File.ReadAllText(target);
            var parser = new SankakuComplexParser();

            var result = parser.parseTagsPage(data, 1);
            Assert.IsNotNull(result);
            Assert.IsTrue(result.Tag.Length == 50, "Count: " + result.Tag.Length);

            List<DanbooruTag> newTagList = new List<DanbooruTag>();

            target = @"../../../DanbooruDownloader3.test/TestXml/sankakutagspage-invalid.htm";
            data = File.ReadAllText(target);
            parser = new SankakuComplexParser();

            result = parser.parseTagsPage(data, 1);
            Assert.IsNotNull(result);
            Assert.IsTrue(result.Tag.Length == 50, "Count: " + result.Tag.Length);

            var filename = "dummy.xml";
            DanbooruTagsDao.Save(filename, result.Tag.ToList());
            DanbooruTagsDao dao = new DanbooruTagsDao(filename);
        }
        public void TestSankakuParser()
        {
            DanbooruProviderDao pd = DanbooruProviderDao.GetInstance();
            string target = @"../../../DanbooruDownloader3.test/TestXml/sankaku_paging.htm";
            var data = File.ReadAllText(target);
            var query = new DanbooruSearchParam();
            query.Provider = pd.Read(sourceProvider).Where(x => x.Name == "Sankaku Complex").First();
            query.Tag = "";
            query.OrderBy = "score";

            var parser = new SankakuComplexParser();

            var result = parser.Parse(data, query);

            Assert.IsNotNull(result);
            Assert.IsTrue(result.Count == 20, "Count: " + result.Count);
            Assert.IsTrue(result[0].Id == "1929657", "Id: " + result[0].Id);
            Assert.IsTrue(result[0].Provider.Name == "Sankaku Complex", "Provider: " + result[0].Provider.Name);
            Assert.IsTrue(result[0].SearchTags == "", "SearchTags: " + result[0].SearchTags);
            Assert.IsTrue(result[0].Query == "tags=order:score", "Query: " + result[0].Query);

            Assert.IsTrue(result[0].Tags == "fate_(series) code_geass fate/zero gilgamesh kotomine_kirei 3boys androgynous armlet blonde bracelet brown_hair clamp_(style) cross cross_necklace earrings enkidu_(fate/strange_fake) fate/strange_fake green_eyes green_hair hand_on_own_face jewelry long_hair multiple_boys necklace parody red_eyes ruchi style_parody toga", "Tags: " + result[0].Tags);
            Assert.IsTrue(result[0].PreviewUrl == "http://c2.sankakustatic.com/data/preview/85/f5/85f54efd7fea7ba91b20ca09ad5823c7.jpg", "PreviewUrl: " + result[0].PreviewUrl);
            Assert.IsTrue(result[0].PreviewHeight == 144, "PreviewHeight: " + result[0].PreviewHeight);
            Assert.IsTrue(result[0].PreviewWidth == 150, "PreviewWidth: " + result[0].PreviewWidth);
            Assert.IsTrue(result[0].Score == "0.0", "Score: " + result[0].Score);
            Assert.IsTrue(result[0].Rating == "s", "Rating: " + result[0].Rating);
        }
        private List<DanbooruTag> CombineLoopTag(int lastPage)
        {
            // construct the tag list from each xml
            List<DanbooruTag> newTagList = new List<DanbooruTag>();
            for (int i = 1; i < lastPage; ++i)
            {
                Program.Logger.Debug("[Download Tags] Merging Page: " + i);
                lblStatus.Text = "Status: Merging Page: " + i + ", this might take some times.";
                lblStatus.Invalidate();
                lblStatus.Update();
                lblStatus.Refresh();
                Application.DoEvents();

                string tempName = TAGS_FILENAME + "." + i + ".!tmp";

                DanbooruTagCollection tempTag;
                if (isSankaku)
                {
                    SankakuComplexParser parser = new SankakuComplexParser();
                    tempTag = parser.parseTagsPage(File.ReadAllText(tempName), i);
                }
                else
                {
                    tempTag = new DanbooruTagsDao(tempName).Tags;
                }
                if (tempTag != null && tempTag.Tag != null)
                {
                    newTagList.AddRange(tempTag.Tag);
                }
            }

            for (int i = 1; i < lastPage; ++i)
            {
                string tempName = TAGS_FILENAME + "." + i + ".!tmp";
                File.Delete(tempName);
            }

            return newTagList;
        }
        private void HandleLoop(string tempName)
        {
            DanbooruTagCollection tempTags = null;
            if (isSankaku)
            {
                string data = File.ReadAllText(tempName);
                if (!string.IsNullOrWhiteSpace(data))
                {
                    tempTags = new SankakuComplexParser().parseTagsPage(data, Page);
                }
                else
                {
                    string message = "Got empty response!";
                    Program.Logger.Error(message);
                    ++retry;
                    if (retry > Int32.Parse(DanbooruDownloader3.Properties.Settings.Default.retry))
                    {
                        WaitForDelay(message);
                        ProcessLoop(--Page);
                    }
                    else
                    {
                        MessageBox.Show(message);
                    }
                }
            }
            else
            {
                tempTags = new DanbooruTagsDao(tempName).Tags;
            }

            if (tempTags == null || tempTags.Tag == null || tempTags.Tag.Length == 0 ||
               (prevTag != null && prevTag.Tag.Last().Name == tempTags.Tag.Last().Name))
            {
                // no more tags
                chkUseLoop.Enabled = true;

                var newTagList = CombineLoopTag(Page);

                if (SelectedProvider != null)
                {
                    string targetXml = "tags-" + SelectedProvider.Name + ".xml";
                    if (File.Exists(targetXml))
                    {
                        if (chkBackup.Checked)
                        {
                            string backupName = targetXml + ".bak";
                            if (File.Exists(backupName))
                                File.Delete(backupName);
                            File.Move(targetXml, backupName);
                        }
                        else
                        {
                            File.Delete(targetXml);
                        }
                    }
                    DanbooruTagsDao.Save(targetXml, newTagList);
                    SelectedProvider.LoadProviderTagCollection();
                    Program.Logger.Info(String.Format("[Download Tags] Private Tags.xml saved to {0}.", targetXml));
                }

                if (chkMerge.Checked)
                {
                    Program.Logger.Debug("[Download Tags] Merging Old Tags.");
                    lblStatus.Text = "Status: Merging Old Tags, this might take some times.";
                    lblStatus.Invalidate();
                    lblStatus.Update();
                    lblStatus.Refresh();
                    Application.DoEvents();

                    DanbooruTagsDao.Save(TAGS_FILENAME + ".merge", newTagList);
                    var message = DanbooruTagsDao.Merge(TAGS_FILENAME + ".merge", TAGS_FILENAME);

                    Program.Logger.Info("[Download Tags] " + message);
                    MessageBox.Show(message, "Tags.xml merged.");

                    File.Delete(TAGS_FILENAME + ".merge");
                }
                else
                {
                    // write back to TAGS_FILENAME
                    DanbooruTagsDao.Save(TAGS_FILENAME, newTagList);
                }

                DanbooruTagsDao.Instance = new DanbooruTagsDao(TAGS_FILENAME);
                Program.Logger.Info("[Download Tags] Complete.");
                lblStatus.Text = "Status: Download complete.";
                if (chkAutoClose.Checked)
                {
                    this.Close();
                }
            }
            else
            {
                // continue next page 
                ProcessLoop(Page);
                prevTag = tempTags;
            }
        }